Remember Journolist[0]? The views of the major news stations and papers have been heavily aligned in one direction for several decades now. Journolist was hard evidence that they colluded in delivering talking points not just among one brand but multiple brands at the same time. Like I said, Sinclair are amatuers to what has, and we have to assume is, going on with most other outlets.
[0] https://en.wikipedia.org/wiki/JournoList